Ribbon mechanism for typewriters



sept.N 2 i924'.- 1,507,354

o. A., HoKANsoN RIBBON KEGHAHISI FOR .TYPEWRITSBS und June s, 1922'Mgt/MW Patented Sept. 2, 1924.

UNITED STATES r OTTO A. EOKANSON, F WOODSTOCK. ILLINOIS, ASSIGNOR T0TOOCDS'IOCIKi TYPE-Y PATENT OFFICE.

WRITER COMPANY, 0F WOODSTOCK, ILLINOIS. A CORPORATION 0F ILLINOIS.

, RIBBON MEcHANIsM ron rvrnwnrrnas.

l nu..-

Application led June 8,

To all wko-m it may concern.:

Be it known that ID OTTO A. HoKANsoN,

a citizen of the United. States, residing at W'oodstock, in the countyof McHenry and State of Illinois, have invented certain new and usefulImprovements in Ribbon Mechanism for Typcwriters, of which the followingis a specification.

This invention relates to ribbon spools and positioning devices therefortogether with the combination of said spools andde vices with mechanismfor controllingthe feeding of the ribbon and especially the re- Versalof the ribbon When it has been unwound from a rib-bon spool. It has forits object the provision of mechanism of the class named Which shall beof improved construction, convenient and efficient in operation, andeconomical to manufacture.

The invention is exemplified in the conibination and arrangement ofparts shown in the accompanying drawing and described in the followingspecification` and it is moreV particularly point-ed out in the appendedclaims.

In the drawing- Fig. 1 is a vertical section of a ribbon spool mountinghavingr one embodiment of the present invention applied thereto;

Fig. 2 is a top plan view of the ribbon spool spindle with the spoolremoved; and

Fig. 3 is a trans-verse section of a ribbon spool comprising a part ofthe present invention. i

In my prior PatentNo. 1,385,548.y issued July 26, 1921. I have'shown anautomatic ribbon reversing mechanism controlled by the ribbon as it isunwound from one or the other of the spools. The present invention is inthe nature of an improvement upon the controlling mechanism for theautomatic ribbon reverse shown in that patent.

In the drawing. the numeral 1() designates a portionY of the top plateofra typewriterV having a. ribbon spool casing 11 mounted .Y

thereon. A spindle 12 is journaled in a bushing 13 supported. on theframe plate 10. A ratchet Wheel 14 is secured to the spindle 12 belowthe plate 10 andis opere ated by pawls 15 in the manner described in myprior patent. The spindle 12 receves arbbon spool 17 on its upper endupon which the ribbon is wound and um 1922. Serial No. 566,759.

wound alternately duringV typewriting o-perations.

The spool 17 is built u of sheet metal and comprises a pair of dup icateheads 18 connected by a central drum 19. The drum 19 consists of asingle sheet of metal bent, as shown in Fig. 3, to provide a core memberupon which the ribbon is Wound and a central socket 20 for receiving theupper end 21 ot the spindle 12. The edges of the core member 19 arereceived in grooves 22 struck outwardly on the spool ,heads 18 and theheads are secured to the core by tongues 23 formed on the socket 2O andbent over on-the outside of the heads 18. The socket portion 20 isconnected with the outer portion of the spool .19 by lat parallel parts24.- and suitable barbs 25 are struck out from the core to engage theend of the ribbon wound upon the spool.

The spool heads 18 are each provided with openings 26 for receiving atrip finger 27 bywh'ich the reversing mechanism is oper* ated. Each headis also provided with a notch 28 disposed opposite the opening 26 forreceivingr a spring 29 which controls the trip finger 27. The heads 18are duplicates oi one another so that the spool may be placed upon thcspindle either side up.

The spindle 12 is provded with an enlargement 30 which forms a shoulderupon which the spool 17 rests. The trip linger 27 is supported upon ayoke 31 which is arranged astride the, enlargement `3() and pivotedAthereto by screws 32. A finger 33 on the yoke 31 engages the'spring 29at a point above the pivotal center of the yoke` as shown in Fig. 1. sothat the spring normally tends to rotate the yoke in a clockwisedirection` as viewed in that figure, urging the trip finger 27 towardthe spindle 12.

The spring 29 is secured to the upper end Y ofthe spindle 12 by a screw34vhich passes through an openingV inthe u per end of the spring 29 andlis threaded into an oplei:- ing 35 in the upper end of thespindle. espringJ 29 may be` provided wlth a downwardly bent portion forY engagina. depression in theupper end of the spindle 12 to properly locate thespring relative to the spindle. The lower end oat the springY is locatedin a notch or recess 36 formed in the enlargement 30 into which recessthe iinger 33 of the yoke 31 projects. The spring 29 is received in therecesses 28 so that the ribbon spoois'fef fron Fh 'll .effin enggeniritof th Spring 'irith theise recesses. VThis serves as a drivingconnection 'between h? 312.001 and Y`Spnllele and l also properlyloeatee the opening 2@ to receive the trip finger 27 when the Spool isplaced upon me Spindle. f The spring 29 is oll'eet at to forni a.yielding stop to retaiiidfli Sliooliuponuihe spindle A verticellvsliding rod 38 YVis pro- ;idll Yr'vitli folto'l' iein'hr i) for peintingthe ribbon revereing niechaniein in' the :r'rnn'ei eli" einediniiixfpgttenf nientioned lljove. Willen ft efe Obl iel'reinov'ed Vfromthe indfle A12 thit-l epinfY KKsihiliie the 'lcontrol nger 27 intoposition diligent the spin- V'that Whsengfthe spool is; replaced.v thelinger ivill enter the' space Within Vtlie core '19 ndmwitliin theripbonwvonnd upon the bore'tlirough the o en ing Y26 inthve lower heed 18.aInria-placing tlie spool .the `rondedhead of 'theecrew 34 Vserves as niriiide to direct Vthe'is'pin'dnlel into the eooliet 50' eind `,sincethe lipper'end of V:the Yspindle Eilieitsf above thgllppr elld el fh@lgfll eive'tliemn er before is niovecl flownvzirlly ,to a' 'evwel'` with`the ilpper end ol' the in'ger. `This willsllvoijd any c'lzlnfler of in-Sertingztlie trip Hngerheltliveen Ithe folds of lll@ ribben. ils Sm ,fiswenn@ lll-@pelli loitecl Within the Space at the interior of the ribbontliyes'prig il'vjll lieffleyileesed leaving" the itilnger and its Lvolge3l Vi'ree ito",iiro'e"uponil efpivotcrews. The finger will resi`algeins't'the inner turn 'of the Vrillon until the ribbon has.beenunwollnd froi'the s' opl at which tiine the linger willlfa'lpliiltp tie position shown in ,l and fft a 'rell'eel' ef .llefllbenleerling ln'echenisni. Y gli rW'ill loe seen 'thglt gi Siinple 1ndefficient ,Cpnllllcllqll ll'LPrQl-llel @In blllvlllcll vill @elle 'lp'een elle@ Oflll-,e Pells libel e Speel le llllll @.136 ,Spllldlelllieepfcllv 9# ellyesrellll atie/nrw .Ollltlle earl .lle dpe-@lori"llrarr* Rilbon niecheniern vfor typewriters ce e indle'forusaid'pooL alcontrol einher. ein? lfor Vplosi- Hf. ,Y epilee connecte v1thtypewriters dle, eA Spool movable into and out of position thereon,uncle, springfatteched to said spin (lle und projecting laterallytherefrom at the end thereof and arrengedlo enter said spool to position`said vspool; on said spindle.`

5. Ribbon lIlQCllanigm coInprisi'n'V u Spindle, `spool movable and outlo" position thereon, and i Spring connected Willi AJthe outer end ofsnijd spindle end projecting 'laterally ibrelenl @Climent sain and'endll extendinol in Vthe"dirreetion of rthe length l'liereolfi saidhaving a recess tleilein errang-ed to register Witli Seid spring Iwhen@nid soool i5 placedl on Yseid Spindle.

6, illiilillon ineohunisnilor typewriters oom, nprising al Spool, aindie for supporting said Spool, f3 contro inenifher lnoilnte lon saidspmlle, land :l springfcarried seid Spindle fel* pesitellille Seid will@lnlilller to cnte'r siid spool. said spool having e reeesstherein toreceive said Spring end Ahold Vsaid spool end spindle against relativerotetion. AV7'. Biblion mechanism for typewriters coinpl'ising a spool.a Spindle foi'enp jortlng said spool, a trip finger Connectedrivith SaidSpindle, and a spring mounted geld Vspin- (lle Vfor moving seid triplinger wierd-'Said Spindle, :Sad lille ellge'gll Said m5051110 hold'said spoo on Seid spln e and prevent relative rotation thereon. l i

' *'8- Ribbem@ hanislinllemprisllg ,Spedi .al Support .tfieren' a".Coellel llene@ Veee@- @iflled with Seid Snell] Wbil in' ielsltiell onSeid enp'pelzl, end 'aeillglll @lille .fler illisitioninglsgid control nspool'end for retaiiiingeaigl spool on eeid Suppor'nd for ilrevlltill'gwallen .Of Seid spool relative to SeidY support.

,llbbell lllellfllliele for lyellrrlrfcom prlslng .a SROL Tl ,splllle.mll'ceimg Seid Speel haring all elle? edfperglien .t leem :ll volgeriveted*Ollflsadgeelefeed' .9.1.1 finger' .Celigl ,by said 'yojlze forenga Ilwithe rihbnii slaid'epohe xSpring ectingfira Willy relativ@ lo.Seid SMOG.) le? Deering Seil? yoke llpbll its `lQs @la elltllt derlei:nil'al with sari. @hier engaging .Seid Spring' 1QRh-'neelheCemrreneesppol, a sllppqirg fior Seideneel, e @Html delli@errang'ed to cooperate with the ribihon on said ice reletive 'to @eidspool. a yoke for said control device pivo-ted on said support, a springacting radially relative to said spool for position ing said controldevice. and means integral with said 'oke for engaging said spring, saidspring being directly engaged by said spool When said spool is inposition on said support to hold said spring in an inactive positionrelative to said yoke.

l1. Ribbon mechanism comprising a spool, a spindle for supporting saidspool, a control device pivoted on said spindle for engaging the ribbonon said spool, a spring carried by said spindle and extending in thedirecton of the length thereof, and means connected with said controldevice for engaging said spring to normally move said control deviceinto close relation with said spindle, said spool engaging said springto compress the same and free said control device therefrom When saidspool is in position on said spindle.

l2. Ribbon mechanism comprising a spindle, a ribbon spool, a controldevice for engaging the ribbon on said spool when said spool is on saidspindle, means for directing said spool onto said spindle and actingradially relative thereto, a spring connected with said spindle forpositioning said control device; means on said spool for engaging saidspindle to compress said spring and free said control device therefromas sald spool is moved onto said spindle, the compression of said springtaking place subsequent to the movement of said spool into registrationwith said control device.

13. Ribbon mechanism comprising a spipdle. a spool having a socket forreceiving said spindle, a trip linger pivoted on said spindle to entersaid spool and engage the ribbon thereon. a spring extendinglongitudinally on said spindle, means connecting said spring with saidtrip finger to hold said trip finger in close relation with said spindlewhen said spring is unrestrained, and means on said spool for engagingsaid spring to compress said spring during the movement of said spoolonto said spindle. said spool being positioned by said spindle toreceive said trip finger prior to registration between said spool andsaid trip finger and the compression of said spring taking placesubsequent to the registration between said spool and trip linger.

14. Ribbon mechanism comprising a spool, a spindle for receiving saidspool, a control device for entering said spool when said spool isplaced upon said spindle, and means for locating said spool on saidspindle in position to receive said control device, said locating meanscomprising a spring for engaging said spool and attached to said spindleadjacent the engaging portion thereof said portion being positioned toact prior to the registration of said control device and spool duringthe movement of the spool onto said spindle.

l5. In combination, a ribbon spool, a spindle for supporting said spool,a control device mounted on said spindle and arranged to enter anopening in said spool when said spool is moved onto said spindle` andmeans on said spindle for angularly positioning said spool to cause theopening therein to register with said control device, said locatingmeans beingr positioned on said'spindle at the outer end thereof to bebrought into cooperation with said spool prior to the registration ofsaid control device with said opening when the spool is moved onto saidspindle.

In testimonyT whereof I have signed my name to this specification onthis 2nd daT of June. A. D. 1.922.

OTTO A. HOKA NSON.

